Yup, as well as being wider, the EX has larger diameter bench (internal flats) and new bead socket to better hold the tyre.

They are wider internally so I suspect the Flow rimstrip would not function properly, if at all, due to the tyre beads seating wider.

I just set up my EX tubless with yellow tape and tubeless ready Hans Dampf - tyres were easier to seat, sealed better than Flows (Flows needed compressor, these went with track pump) and no burping issues on the first ride despite pushing quite hard at slightly lower pressures.